carb jetting maybe flooding?

[vespaskin86]

hi everyone i'll do my best to describe my problem i think i know the answer just wanted to double check see your thoughts opinions i put a hole in my kickstart side casing on 1 scoot dunno how but be reit give me something to do in my time off from work needed a rebuild too so i decided to transplant my fun engine from my unfinnished project i've built into my scoot to keep me on rd. the engine is a pinasco 177 big bore kit matched casing 60mm cut crank 28mm phb carb with and fat scoot rs pipe.

1st problem it used to idle fine when kicked over and prior to running but teeth on kick start have worn and it slips so need to bump it and doesn't seem to wanna idle no more, any ideas why?

2nd problem is when opening the throttle up too quick from a standing start or open too much when bumping it doesnt wanna set off its sluggish and wants to cut out, as well as de-accelerating letting of the revs when slowing down a very similar symptom happens. would this be flooding of the engine? this is my 1st thought. 
maybe my main jet too high? i cant remember off top of my head how carb set i was given a rough jetting from my local scoot shop to try and was told if too rich change needle position, so maybe my needle position wrong?

im not so good with phb carbs 1st time trying one so any tips be greatly appreciated, si carbs seem alot easier to set up. it runs really well when running but not setting off or slowing down or idleing lol. i can open it up it responds well. seems quite fast not that i  wouldnt know how fast as my speedo dosent work. not that there very reliable nor i had the balls to open it up all way yet too. plug colour not so bad slightly rich with 3% premix

i'm guessing its flooding probably main jet too big for the 2nd problem and it maybe linked to the 1st problem too any help opinions rthoughts be greatly appreciated
thanks
jon

[henri]

drop ya needle a notch or 2 an see if that helps before changing main jet , an also try a smaller pilot jet to get it idling , 1st tho you need to check ya timing ,as phb carbs are more difficult to dial in than spacos and more exact ,so little discrepancys elsewhere have a bigger effect on them , but what you describe sounds like bogging , too rich a mix ,if dropping the needle doesnt clear it a fatter/leaner profile needles needed ,an maybe a corresponding smaller main ,
unscrew carb top,pull slide out an move the clip 1 notch nearer the fat end of needle ,effectively makin needle sit lower , try that ,if theres a improvement but not cure try another notch til needle runs out of notchs , H

[vespaskin86]

cheers h will do

[vespaskin86]

i've dropd needle down and lowered main jet seems alot better its not bogging as much and got a better plug colour but not running perfect though still a tiny bog when it opens up too fast.
how do i check timing to make sure its rite? someone suggested a strobe light?
i know how to set a up standard engine by lining up the stator markings and pinasco reccomend standard timing according to beedspeed and my previouse pinasco engine was standard timing too. but wouldnt the 60mm crank alter the timing i'm guessing the porting too will?

[henri]

even on a stock engine i only use the marks as a guide to getting it started so i can then strobe it to marks ive made an know are good , degree disc ,or vespacos trick of old cd an skool protracter , find tdc with a guide ,or by feel/sight down the plug hole with a soft piece of wire ,or drill out a old plug an stick a m6 bolt bolted through plug body ,an use that as a piston stop ,once youve found tdc measure back the 19 degrees make another mark n strobe to that ,
the different crank wont alter where you time too an neither will the porting ,unless you want to advance it an try an squeeze the last ounce of power there ,but will take you to the raggedy edge of safe running/pinking ,i'd stick with stock timing done accurately , H

[vespaskin86]

ok cheers henri, im suprised the kit crank and porting doesnt effect the timing from stock i'm guessing stock timing, a dyno session and help from a mate for timing is in order hopefully one will have a strobe and know what to do